YASKAWA OYMC V1000, Programming Manual

Page: 85 / 408

1.3 C: Tuning
YASKAWA ELECTRIC SIEP C710606 10A YASKAWA AC Drive - V1000 PRELIM. Programming Manual 85
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Adjustment
Although C4-02 rarely needs to be changed, adjustments may help in the following
situations:
• If the motor vibrates, increase C4-02
• If the motor responds too slowly to changes in the load, decrease C4-02.
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C4-03: Torque Compensation at Forward Start (OLV only)
Sets the amount of torque at start in the forward direction in order to improve motor
performance during start with heavy load. Compensation is applied using the time constant
set in parameter C5-05. A setting of 0.0% disables this feature.
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C4-04: Torque Compensation at Reverse Start (OLV only)
Sets the amount of torque reference at start in the reverse direction in order to improve motor
performance during start with heavy load. Compensation is applied using the time constant
set in parameter C5-05. A setting of 0.0% disables this feature.
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C4-05: Torque Compensation at Start Time Constant (OLV only)
This parameter is the time constant for applying the torque compensation at start set in
parameters C4-03 and C4-04.
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C4-06: Torque Compensation Primary Delay Time 2 (OLV only)
This time constant is used during Speed Search or when the motor slip is greater than minus
0.5 times the rated slip (regenerative mode). Adjust the value if an overvoltage fault occurs
with sudden changes in the load or at the end of acceleration with high inertia load.
No. Parameter Name Setting Range Default
C4-02 Torque Compensation Primary Delay Time 1 0 to 60000 ms
Determined by
A1-02
No. Parameter Name Setting Range Default
C4-03 Torque Compensation at Forward Start 0.0 to 200.0% 0.0%
No. Parameter Name Setting Range Default
C4-04 Torque Compensation at Reverse Start -200.0 to 0.0% 0.0%
No. Parameter Name Setting Range Default
C4-05 Torque Compensation Time Constant 0 to 200 ms 10 ms